{"id":"CVE-2026-46266","summary":"inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ninet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP\n\nYizhou Zhao reported that simply having one RAW socket on protocol\nIPPROTO_RAW (255) was dangerous.\n\n  socket(AF_INET, SOCK_RAW, 255);\n\nA malicious incoming ICMP packet can set the protocol field to 255\nand match this socket, leading to FNHE cache changes.\n\ninner = IP(src=\"192.168.2.1\", dst=\"8.8.8.8\", proto=255)/Raw(\"TEST\")\npkt = IP(src=\"192.168.1.1\", dst=\"192.168.2.1\")/ICMP(type=3, code=4, nexthopmtu=576)/inner\n\n\"man 7 raw\" states:\n\n  A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able\n  to send any IP protocol that is specified in the passed header.\n  Receiving of all IP protocols via IPPROTO_RAW is not possible\n  using raw sockets.\n\nMake sure we drop these malicious packets.","modified":"2026-06-18T03:56:09.118282142Z","published":"2026-06-03T15:50:07.907Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46266.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99"},{"type":"WEB","url":"https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46266.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46266"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"},{"fixed":"db76b75ede3810e7cf9cfea5067d4f3e0993768b"},{"fixed":"19e42490c89bac9a388f28179e66bebbef350f99"},{"fixed":"531c1aec81bfe19d00af13da5531fbb8209e4bd2"},{"fixed":"719d3932b8f6e3348ce2f0ac58e278301fc17575"},{"fixed":"c89477ad79446867394360b29bb801010fc3ff22"}]}],"versions":["v6.19-rc2","v6.19","v6.6.127","v6.12.74","v6.19.3","v6.18.13","v6.19.2","v6.18.12","v6.12.73","v6.6.126","v6.19.1","v6.18.11","v6.12.72","v6.6.125","v6.18.10","v6.12.71","v6.6.124","v6.12.70","v6.18.9","v6.12.69","v6.6.123","v6.19-rc8","v6.19-rc1","v6.19-rc6","v6.18.8","v6.12.68","v6.6.122","v6.19-rc7","v6.19-rc5","v6.19-rc4","v6.18.7","v6.12.67","v6.6.121","v6.19-rc3","v6.18.6","v6.12.66","v6.18.5","v6.12.65","v6.6.120","v6.18.4","v6.12.64","v6.6.119","v6.18.3","v6.12.63","v6.18.2","v6.18.1","v6.12.62","v6.18","v6.12.61","v6.18-rc1","v6.12.60","v6.6.118","v6.18-rc7","v6.18-rc3","v6.12.59","v6.6.117","v6.18-rc5","v6.18-rc6","v6.18-rc2","v6.12.58","v6.6.116","v6.18-rc4","v6.12.57","v6.12.56","v6.6.115","v6.12.55","v6.6.114","v6.12.54","v6.6.113","v6.12.53","v6.6.112","v6.12.52","v6.6.111","v6.12.51","v6.6.110","v6.17","v6.17-rc7","v6.12.50","v6.6.109","v6.17-rc1","v6.17-rc2","v6.12.49","v6.6.108","v6.17-rc6","v6.17-rc4","v6.17-rc5","v6.17-rc3","v6.16","v6.12.48","v6.6.107","v6.12.47","v6.6.106","v6.12.46","v6.6.105","v6.12.45","v6.6.104","v6.12.44","v6.6.103","v6.12.43","v6.6.102","v6.12.42","v6.12.41","v6.6.101","v6.16-rc6","v6.12.40","v6.6.100","v6.16-rc1","v6.16-rc4","v6.16-rc2","v6.16-rc5","v6.16-rc7","v6.16-rc3","v6.12.39","v6.6.99","v6.14-rc3","v6.12.38","v6.6.98","v6.12.37","v6.6.97","v6.12.36","v6.6.96","v6.12.35","v6.6.95","v6.12.34","v6.6.94","v6.12.33","v6.6.93","v6.15","v6.12.32","v6.15-rc1","v6.15-rc6","v6.15-rc3","v6.12.31","v6.6.92","v6.12.30","v6.15-rc2","v6.15-rc7","v6.15-rc4","v6.12.29","v6.6.91","v6.12.28","v6.6.90","v6.15-rc5","v6.12.27","v6.6.89","v6.12.26","v6.14","v6.12.25","v6.6.88","v6.12.24","v6.6.87","v6.12.23","v6.12.22","v6.6.86","v6.12.21","v6.6.85","v6.14-rc1","v6.14-rc7","v6.14-rc6","v6.12.20","v6.6.84","v6.14-rc4","v6.14-rc5","v6.12.19","v6.6.83","v6.14-rc2","v6.12.18","v6.6.82","v6.6.81","v6.12.17","v6.6.80","v6.12.16","v6.6.79","v6.12.15","v6.6.78","v6.13","v6.12.14","v6.13-rc1","v6.12.13","v6.6.77","v6.6.76","v6.12.12","v6.6.75","v6.12.11","v6.6.74","v6.13-rc6","v6.12.10","v6.6.73","v6.6.72","v6.13-rc7","v6.13-rc2","v6.12.9","v6.6.71","v6.13-rc5","v6.13-rc3","v6.6.70","v6.12.8","v6.6.69","v6.12-rc1","v6.13-rc4","v6.12.7","v6.6.68","v6.12.6","v6.6.67","v6.12.5","v6.6.66","v6.12.4","v6.6.65","v6.6.64","v6.12","v6.12.3","v6.6.63","v6.12.2","v6.12.1","v6.12-rc7","v6.6.62","v6.6.61","v6.12-rc3","v6.6.60","v6.12-rc4","v6.12-rc6","v6.12-rc5","v6.6.59","v6.12-rc2","v6.6.58","v6.6.57","v6.11-rc1","v6.6.56","v6.11-rc5","v6.6.55","v6.6.54","v6.11","v6.6.53","v6.6.52","v6.11-rc7","v6.6.51","v6.10-rc1","v6.11-rc6","v6.11-rc3","v6.6.50","v6.11-rc4","v6.6.49","v6.11-rc2","v6.6.48","v6.6.47","v6.10","v6.6.46","v6.6.45","v6.6.44","v6.6.43","v6.6.42","v6.6.41","v6.10-rc6","v6.6.40","v6.10-rc7","v6.6.39","v6.10-rc3","v6.9-rc1","v6.6.38","v6.10-rc5","v6.10-rc2","v6.6.37","v6.6.36","v6.10-rc4","v6.6.35","v6.9","v6.6.34","v6.6.33","v6.6.32","v6.6.31","v6.6.30","v6.9-rc6","v6.9-rc7","v6.9-rc5","v6.9-rc3","v6.9-rc2","v6.8","v6.9-rc4","v6.6.29","v6.6.28","v6.8-rc1","v6.6.27","v6.6.26","v6.6.25","v6.6.24","v6.6.23","v6.6.22","v6.7-rc1","v6.8-rc7","v6.6.21","v6.8-rc6","v6.8-rc5","v6.8-rc4","v6.8-rc3","v6.8-rc2","v6.6.20","v6.6.19","v6.6.18","v6.6.17","v6.6.16","v6.6.15","v6.6.14","v6.6.13","v6.7","v6.6.12","v6.7-rc3","v6.7-rc8","v6.6.11","v6.7-rc7","v6.6.10","v6.6.9","v6.7-rc6","v6.6.8","v6.7-rc2","v6.6.7","v6.7-rc4","v6.7-rc5","v6.6.6","v6.6.5","v6.6.4","v6.6","v6.6.3","v6.6.2","v6.6.1","v6.6-rc1","v6.6-rc5","v6.6-rc3","v6.6-rc7","v6.6-rc6","v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